LASER INTERFERENCE METER OF HYDROSPHERE PRESSURE VARIATIONS Russian patent published in 2023 - IPC G01L23/06 G01L7/08 

FIELD: measurement equipment.

SUBSTANCE: invention can be used to measure micro-oscillations of underwater pressure and study the spatio-temporal structure of geophysical fields in the infrasound and sound ranges. The meter includes a sealed housing consisting of a measuring chamber and a compensation chamber equipped with an external pressure compensation system. The measuring chamber contains two identical optical systems based on Michelson interferometers located parallel to each other, each of which contains a monochromatic radiation source, a registration system configured to change the length of the optical path, a fixed reflector in the form of a mirror mounted on dual piezoceramic transducers, and a movable reflector in the form of a round measuring membrane with a mirror element in the center. The membranes have different physical and mechanical properties and are installed in the outer wall of a single compensation chamber at the minimum possible distance from each other.

EFFECT: increase in the accuracy of the information received and decrease in the measurement error of signal reception.

4 cl, 1 dwg